Severe reasons for black grape berry drop
Core introduction of this article: Introduction to the severe reasons for black grape berry drop in the field of green plants and flowers, the following editor will answer your questions in detail.
Severe reasons for black grape berry drop
Black grapes are an excellent variety, characterized by disease resistance, high yield, early maturity, and good taste. However, severe berry loss often occurs during the cultivation of Xiahei (summer black) grapes, resulting in significant yield losses. So, what exactly causes the severe dropping of black grapes in summer? Let's take a look.
Genetics
Xiahei grapes naturally tend to drop fruit and flowers, which is a common issue. Other grape varieties also experience similar berry drop, but the drop in Xiahei grapes is more severe than in other varieties. Xiahei grapes have large berry size and soft mature fruits, making genetic issues hard to resolve.
Poor Management
Improper planting management can also lead to severe fruit drop in summer black grapes, such as excessive fruit quantity, tight berry spacing, insufficient growth space for fruits, and berries being squeezed out as they gradually expand. The best solution is to properly thin flowers and fruits, control the number of berries and their spacing, and control the ratio of fruit to leaves. Moreover, deficiencies in boron or zinc during flowering, or improper water and fertilizer management can also lead to severe berry loss, such as partial application of nitrogen fertilizer during the fruit setting stage.
Climate Factors
In the middle and late stages of flowering of summer black grapes, bad weather, excessive rainfall, and field waterlogging can lead to high humidity and the absorption of excessive moisture by fruits, which the pedicel cannot withstand. At the same time, reduced sunlight can affect the photosynthesis of leaves, causing a lack of synthesized nutrients, insufficient nutrients required for fruit growth and development, and possibly leading to berry drop.
Diseases
When summer black grapes are infected with diseases such as T-J and white rot, berry drop can occur. Many fruit farmers believe that disease prevention should be done after fruit setting, or even during coloring, which is too late. Since the prevention and treatment of fungal diseases should start in their latent period, chemical agents can be sprayed before flowering to prevent T-J disease and white rot, which results in better control. Additionally, fallen branches and leaves on the ground should be cleared in time to prevent fungal growth.
The above are the severe reasons for the dropping of summer black grapes, hoping it will be helpful to you.
The specific introduction of the severe reasons for black grape berry drop mentioned above is provided for you, hoping to bring some floral knowledge to flower enthusiasts.